Can anyone tell me why my clock in my series 2 SC sounds like a machine gun? it's working but whenever it self winds it get's a bit too enthusiastic and seems to be overwinding (maybe?) I've had it apart but just to give everything a little clean to see if it improved matters, it didn't. Incidentally I didn't oil it, I know that causes problems with clocks, just a little detail brush out and a bit of gentle blowing out too.